The power supply and signal are fully isolated, providing stronger anti-interference capability and safer operation. USB to RS485 converter enables PC users to connect RS485 devices to systems with a USB interface. By connecting the converter to a PC, there is no need to open the chassis or shut down the computer to install additional hardware. The converter adds one high-speed RS485 port instantly. Since power is supplied through the USB port, no external power adapter is required, making it ideal for use with PLCs, printers, POS systems, and industrial control devices. Power supply: USB 5V Transmission distance: up to 1200 meters (at 9600bps) Chip solution: CH340E Communication protocol: Pure hardware design, independent of communication protocols Baud rate: Up to 256000bps, supports bidirectional transmission and higher baud rates Power and signal are completely isolated for enhanced interference resistance Protection features: TVS transient suppression, electrostatic ESD protection, surge protection, short signal line and short-circuit protection (short-circuit tolerant without damage) Operating temperature range: -40°C to 80°C System compatibility: Supports hot swapping; compatible with Windows 98, 2000, 2003, 2008, XP, WIN7, WIN8, WIN10, VISTA, Linux, and OS X. USB interface supports hot swap. Automatically detects and controls data transmission direction without requiring handshake signals (such as DTR) or jumper settings for mode switching, ensuring compatibility with existing communication software and hardware. PCB board color inside the converter may vary randomly by batch; color selection is not available. Converter color may appear slightly different due to monitor display variations. Color: Blue Material: PCB + Plastic + Metal Dimensions: 70 x 27 x 13mm Package Contents: 2 x USB to RS485 Communication Module Note: The package includes only the items listed above. Other products are not included. Note: Lighting and monitor differences may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3cm.